I had a question about the cbm's, I got of a VCR, it was copper middle with a metal bracket that looked like graphite...but didn't mark paper. But when hit it shatters..what's this?
Ferrite. From Wiki:
Ferrite (iron), iron or iron alloys with a body centred cubic crystal structure.
Ferrite (magnet) (e.g. Fe3O4 or BaFe12O19), ferrimagnetic ceramic materials used in magnetic applications.
Ferrite bead, components placed on the end of data cables to reduce interference.
Ferrite core, a structure on which the windings of electric transformers and other wound components are formed.
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